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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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2 in stock
Super-precision angular contact ball bearing, 25 mm bore x 52 mm OD x 15 mm wide, 30° contact angle, phenolic cage, medium-preload universal duplex set.
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$132.84
2 in stock
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| MFR / Brand | RHP |
|---|---|
| Model | 7205 A T DUM P5 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 25 mm |
| OD | 52 mm |
| Width | 15 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Base Number | 7205 |
| Industry Terms | Spindle bearing; machine tool bearing; super precision angular contact; duplex pair; thrust bearing pair |
| Common Misspellings | 7205 ATDUM P5; 7205A TDUMP5; RHP 7205 ADUM |
| Application Types | Drilling and boring spindles; worm and bevel gear supports; ball screw thrust positions; precision indexing heads |
| Bore Shaft Size | 25 mm |
| Mpn Variants | 7205ATDUMP5; 7205-A-T-DUM-P5; 7205 A T DUM P5; 7205ATDUM P5; 7205A |
| Manufacturer Status | RHP spindle bearing lines absorbed into NSK |
| Precision Class | P5 (ISO class 5 / ABEC 5) |
| Rolling Elements | Ball |
| Number Of Rows | Single row per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 30 degrees |
| Part Number | 7205ATDUMP5 |
A super-precision angular contact ball bearing in the 72-series, 25 mm bore × 52 mm outside diameter × 15 mm width. The 72-series is the medium section of the angular contact range — a heavier ring cross-section than a 70-series bearing of the same bore, so more load capacity in exchange for a larger outside diameter.
7205 is the ISO 72-series angular contact envelope, 25 x 52 x 15 mm. A is a 30° contact angle: the older RHP angle codes map across as X2 = 15°, X3 = 25°, X4 = 30°, which is why the alternate designation 7205X4TADUMEP5 appears on these parts, with X4 and A agreeing on 30°. T is a machined laminated phenolic cage, outer-ring guided. DUM is duplex universal, medium preload, with ground faces that let the set be assembled back-to-back, face-to-face or tandem without shimming. P5 is ISO tolerance class 5, equivalent to ABEC 5.
30° is the steepest of the common spindle angles and the most thrust-biased. It gives the highest axial stiffness and the best resistance to axial deflection under heavy one-way thrust, which is why it turns up in drilling and boring spindles, worm and bevel gear supports, and ball screw thrust positions. The cost is speed and heat: a 30° bearing runs hotter at a given rpm than a 15° bearing of the same envelope, and its limiting speed is lower. Because the angle drives so much of the behaviour, matching it across the spindle stack matters more than matching the brand. Contact Angle: 30°. Cage Material: Laminated phenolic. Precision Class: P5 (ISO class 5 / ABEC 5). Mass: 0.28 lbs.
DUM denotes a matched duplex pair, ground and marked as a set for back-to-back, face-to-face or tandem mounting.
The carton designation for this part is 7205X4TADUMEP5, where TA denotes the one-piece outer-ring-centred machined phenolic cage and X4 confirms the 30° angle. A 3MM205WI CR DUM marking also circulates against this envelope; in the Fafnir/Timken scheme the 3MM prefix denotes 25°, not 30°, so that designation is retained as a search term only and is not an angular match. NSK A5 codes are also 25° and are not 30° parts. RHP spindle bearings passed to NSK, which is the current source for new production.
$111.47
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